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How can I find a pid by name or full command line in Ruby, without calling an external executable?
I am sending SIGUSR2 to a process whose command line contained ruby job.rb. I would like to do the following without the call to pgrep:
uid = Process.uid
pid = `pgrep -f "ruby job.rb" -u #{uid}`.split("\n").first.to_i
Process.kill "USR2", pid
A quick google search came up with sys_proctable, which should let you do this in a portable way.
Disclaimer: I don’t use Ruby, can’t confirm if this works.